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Breeding / Calving Issues
Latest results of a timed AI study
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<blockquote data-quote="bandit80" data-source="post: 538873" data-attributes="member: 7956"><p>I will be able to tell you next year about mid-February!!! In all seriousness, the best % preg rates from a timed AI study on cows that I have seen is an average 66%. Heifers are a little higher than that. One of the vets that works at the clinic I use has a herd of 20 cows. The last 2 years he has pulled the CIDRs and heat detected and bred 12 hours after the onset of standing heat like you describe. He has gotten 14 and 15 AI calves the last two years, and each year he had 19 cows "respond" to the CIDR. So, he is running about 75%. I know if I got 75% preg rates out of a synchronization protocol, I would do cartwheels back home from the barn.</p></blockquote><p></p>
[QUOTE="bandit80, post: 538873, member: 7956"] I will be able to tell you next year about mid-February!!! In all seriousness, the best % preg rates from a timed AI study on cows that I have seen is an average 66%. Heifers are a little higher than that. One of the vets that works at the clinic I use has a herd of 20 cows. The last 2 years he has pulled the CIDRs and heat detected and bred 12 hours after the onset of standing heat like you describe. He has gotten 14 and 15 AI calves the last two years, and each year he had 19 cows "respond" to the CIDR. So, he is running about 75%. I know if I got 75% preg rates out of a synchronization protocol, I would do cartwheels back home from the barn. [/QUOTE]
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Latest results of a timed AI study
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